Question about APC Computers & Internet
Steady high pitched noise after a power sag in electricity
Posted by Anonymous on
Youe devices should not exceed the ratings of the UPS. Example maximum load is 600 watts then the sum of the power of your devices connected to the backup side should not exceed 600. If the unit is more than 2 years old the batteries should be replaced. As mentioned before Laser Printers have a very large surge on the backup and should not be backed up. They should be hookup to normal side or another outlet.
Posted on Jan 18, 2015
Why don't you replace the battery
Posted on Jan 16, 2015
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Posted on Jan 02, 2017
SOURCE: APC ES350 strange noise
My solution was to unplug everything, hit the reset button, and then power the unit back up. The problem I found to be that I had my laser printer connected to the "surge + battery" side, and for some reason no laser printer can be connected to it.
Posted on May 28, 2009
More than likely it is the battery. These units simply test the voltage during the self test, and, although not typical, the battery voltage could be good without a load, but fail with a load. 3 years is generally the life span of SLA batteries. Replacement batteries are fairly inexpensive and can be found at: http://batteryinternational.com/ups-batteries-apc-batteries.html
Posted on May 25, 2010
Yes, The batteries in UPS systems have a 2.5 to 3 year life span so your unit does need new batteries. The whine is usually caused by the charge circuit trying to push the charge to the damaged cells in the battery. You should be able to get replacement batteries from your local battery dealer, no need to order "special" UPS batteries. Open your UPS cover and remove the old battery and bring it to the dealer and they will match it to their stock.
Posted on Jul 20, 2012
Testimonial: "Thank you Mcsparrin, your advice led me to realize that what I needed was a new backup battery, which I did order. You were very helpful and I do appreachate your help. Best Wishes, Glen"
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